Title:
STORAGE SYSTEM AND METHOD OF CONTROLLING SAME
Document Type and Number:
WIPO Patent Application WO/2012/011158
Kind Code:
A1
Abstract:
Data migration is efficiently executed with optional timing. A file server outputs an instruction to a CPU of a storage apparatus to migrate a file belonging to Tier 1 to Tier 2 when, based on policy information, a condition for migrating the file belonging to Tier 1 to Tier 2 is fulfilled. Based on the instruction from the file server, the CPU copies the data of migration target files in Tier 1 from a page to a Tier 1 virtual page, copies the data which has been copied to the Tier 1 virtual page 114 to a Tier 2 virtual page, copies the data which has been copied to the Tier 2 virtual page to any page in Tier 2, and then overwrites and releases the Tier 1 and Tier 2 virtual pages, and migrates files belonging to Tier 1 to Tier 2.
Inventors:
SHOJI, Tomoki (C/O HITACHI LTD, Disk Array Systems Division 322-2, Nakazato, Odawara-sh, Kanagawa 72, 25008, JP)
OKAMOTO, Takuya (C/O HITACHI LTD, Disk Array Systems Division 322-2, Nakazato, Odawara-sh, Kanagawa 72, 25008, JP)
SHITOMI, Hidehisa (C/O HITACHI LTD, Disk Array Systems Division 322-2, Nakazato, Odawara-sh, Kanagawa 72, 25008, JP)
OKAMOTO, Takuya (C/O HITACHI LTD, Disk Array Systems Division 322-2, Nakazato, Odawara-sh, Kanagawa 72, 25008, JP)
SHITOMI, Hidehisa (C/O HITACHI LTD, Disk Array Systems Division 322-2, Nakazato, Odawara-sh, Kanagawa 72, 25008, JP)
Application Number:
JP2010/004734
Publication Date:
January 26, 2012
Filing Date:
July 23, 2010
Export Citation:
Assignee:
HITACHI, LTD. (6-6 Marunouchi 1-chome, Chiyoda-ku Tokyo, 80, 10082, JP)
SHOJI, Tomoki (C/O HITACHI LTD, Disk Array Systems Division 322-2, Nakazato, Odawara-sh, Kanagawa 72, 25008, JP)
OKAMOTO, Takuya (C/O HITACHI LTD, Disk Array Systems Division 322-2, Nakazato, Odawara-sh, Kanagawa 72, 25008, JP)
SHITOMI, Hidehisa (C/O HITACHI LTD, Disk Array Systems Division 322-2, Nakazato, Odawara-sh, Kanagawa 72, 25008, JP)
SHOJI, Tomoki (C/O HITACHI LTD, Disk Array Systems Division 322-2, Nakazato, Odawara-sh, Kanagawa 72, 25008, JP)
OKAMOTO, Takuya (C/O HITACHI LTD, Disk Array Systems Division 322-2, Nakazato, Odawara-sh, Kanagawa 72, 25008, JP)
SHITOMI, Hidehisa (C/O HITACHI LTD, Disk Array Systems Division 322-2, Nakazato, Odawara-sh, Kanagawa 72, 25008, JP)
International Classes:
G06F3/06
Attorney, Agent or Firm:
OHGA, Shinji et al. (SUNNEXT INTERNATIONAL PATENT OFFICE, 3rd Floor Shiodome Building, 1-2-20, Kaigan, Minato-k, Tokyo 22, 10500, JP)
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Claims:
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